Carb Spacers and heat shields.
Printed From: The Ford Torino Page
Category: Model Specific Forum
Forum Name: General Automotive Technical Discussion
Forum Description: Technical Automotive discussion of anything not specific to mid-size Ford/Merc
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=18963
Printed Date: 30-September-2023 at 4:19PM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: Carb Spacers and heat shields.
Posted By: 72FordGTS
Subject: Carb Spacers and heat shields.
Date Posted: 08-July-2020 at 2:27PM
|
If have heat soak issues with my Torino if I let it sit for about 30 minutes after shutting it off when hot. I believe the fuel is boiling over. I was thinking of trying out a 1/2" wood or phenolic spacer to help reduce the heat soak of the carb. I know Holley also makes a heat shield, which shields the fuel bowls. I would think the heat shield would be more effective but it isn't the most attractive add-on. Anyone use either or to help reduce carb hear soak? Any opinions? ------------- Vince 1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
Replies:
Posted By: californiajohnny
Date Posted: 08-July-2020 at 3:01PM
1/2" solid plastic phenolic spacer... i have them on 3 of my cars... no issues! ![1/2" Ported Phenolic Carburetor Spacer 4bbl Fits Holley SB Chevy Ford SBC BBC BB](https://i.ebayimg.com/thumbs/images/g/BREAAOSw0rRbd1Aw/s-l225.jpg "1/2" Ported Phenolic Carburetor Spacer 4bbl Fits Holley SB Chevy Ford SBC BBC BB") ------------- JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
Posted By: 72FordGTS
Date Posted: 09-July-2020 at 2:17AM
|
Thanks John, that's exactly the style I was thinking of running. What brand and part number is that? ------------- Vince 1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
Posted By: 72FordGTS
Date Posted: 10-July-2020 at 4:06AM
|
I contacted Edelbrock, and they recommended running a 8725 spacer with my 2171 intake. It's a divided spacer not a 4 hole. I was thinking a 4 hole would work best, but do you guys think a divided dual plane type spacer would work fine? I am more interested in heat isolation than any performance gains. But I don't want to lose anything either. The 2171 intake has a really small mounting surface so requires a carburetor plate. The Edelbrock tech said the 8725 is the best sized spacer for the intake and I can then drop the carb plate. He said I could run a the Edelbrock 4 hole spacer, but I'd need to run the carb plate and the spacer. Seems like too much potential for vacuum leaks to me. Any thoughts?
My Intake  The stock setup is to use a 2732 carb plate  This is the spacer Edelbrock recommends  ------------- Vince 1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
Posted By: californiajohnny
Date Posted: 10-July-2020 at 2:15PM
|
divided or 4 hole on a dual plane open on an open intake... this isn't who i got mine from but the same piece http://www.ebay.com/itm/1-2-Ported-Phenolic-Carburetor-Spacer-4bbl-Fits-Holley-SB-Chevy-Ford-SBC-BBC-BB/271428828496?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D225086%26meid%3Dc3d39dba576b4f5aa7802b7b9f3b0687%26pid%3D100290%26rk%3D3%26rkt%3D4%26sd%3D353128367854%26itm%3D271428828496%26pmt%3D0%26noa%3D1%26pg%3D2060778&_trksid=p2060778.c100290.m3507" rel="nofollow - https://www.ebay.com/itm/1-2-Ported-Phenolic-Carburetor-Spacer-4bbl-Fits-Holley-SB-Chevy-Ford-SBC-BBC-BB/271428828496?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D225086%26meid%3Dc3d39dba576b4f5aa7802b7b9f3b0687%26pid%3D100290%26rk%3D3%26rkt%3D4%26sd%3D353128367854%26itm%3D271428828496%26pmt%3D0%26noa%3D1%26pg%3D2060778&_trksid=p2060778.c100290.m3507 ------------- JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
Posted By: Rockatansky
Date Posted: 10-July-2020 at 3:04PM
|
how much hood clearance do you have to the filter housing? think about if you want to maintain the divided plenum or take advantage of some cfm sharing between the 2 sides. most 2 plane intakes have a notch cut out of the plenum divider, it seems to improve performance significantly. this is the traditional divider notch  this is the Airgap with it's enhanced notch that is surely a reason the intake performs as it does, with no user complaints of diminished low end  you could use a short open spacer to create a similar sharing capability, or remove the center strip of the split spacer. just don't leave anything that could break off, cut it near the edges so what's left is strong enough to support itself
------------- 72 GT Ute |
Posted By: 72FordGTS
Date Posted: 11-July-2020 at 12:37AM
|
Thanks guys. Rock, good info. I will have to check my hood clearance. It's too bad there aren't more options for a 400 intake. ------------- Vince 1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
Posted By: californiajohnny
Date Posted: 11-July-2020 at 7:02AM
|
you could accomplish the same thing by cutting 1/2 way in the bottom of the divided spacer since it's plastic you could use an end cut style router bit in a router to cut a notch to give it balance between each plane ------------- JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
Posted By: Rockatansky
Date Posted: 11-July-2020 at 7:24AM
nothing a hacksaw blade and a file can't handle  ------------- 72 GT Ute |
Posted By: californiajohnny
Date Posted: 11-July-2020 at 8:10AM
power tools, son, that's where it's at  a router is like a hand held milling machine for softer materials  ------------- JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
Posted By: 72FordGTS
Date Posted: 13-July-2020 at 1:31PM
|
Here some interesting info from George P on notching the intake divider: https://pantera.infopop.cc/topic/why-the-habit-of-cutting-notches-in-the-plenum-dividers-of-dual-plane-intake-manifolds-began" rel="nofollow - https://pantera.infopop.cc/topic/why-the-habit-of-cutting-notches-in-the-plenum-dividers-of-dual-plane-intake-manifolds-began ------------- Vince 1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
Posted By: Rockatansky
Date Posted: 13-July-2020 at 3:25PM
|
pretty sure i put George onto the origin of the plenum notch, the first time i saw a Holley 3bbl i knew why it's there. darn thing won't open without the notch! from there i think it was just a lucky accident that it was discovered to improve all around performance with any carb on the manifold. smoother idle and improved TQ through the midrange all the way to an increased redline. the modification got attached to Holman-Moody at some point, they described the mod as being a full 1" deep cut into the divider, that's quite a bit and more than i'd recommend for a driver. i think that huge H-M cut is why George goes conservative on the notch, i wouldn't doubt there's some downside in the low end with the race cut. George has been known to advocate for an intact divider wall whenever possible, i'm not sure what his current feelings about it are today? and Panteradoug, i enjoy his 1 man arguments for sure the cool part is if you mod the spacer it's minimal to reverse it ------------- 72 GT Ute |